Indicator for furnaces, &amp;c.



` A. E. POWELL. 4INDIGATOR PoR FURNAGES, am.

APPLIOATIOBPI-LBD HAB. 271 1902.

mNumN. D. c.

"ATENT Fries,

ALBERT E. POWELL, OF MONMOUTII, ILLINOIS.

INDICATOR FOR FURNACES, sbc.

SPECIFICATION forming part of Letters Patent No. 723,303, dated March24, 1903,

Application led March 27,1902.

To @ZZ whom/it may concern:

Beit known'that I, ALBERT,` E. POWELL, a

i citizen of the United States, residing at Monmouth, in the county ofWarren and State of` Illinois, have invented certain new andusefullmprovements in Indicators for Furnaces, dac. of which `thefollowing is a specification.

The present invention relates to a device by which the condition of there as viewed from the back or side of the furnace will be indicated orshown to the fireman while athis post in front of the furnace.

In carrying out my invention I make use of a system of reectors soarranged with relation to each other that rays of light issuing fromitheinterior of the fire-box will strike upon a reflector located directlyin front of a suitable hole or opening through the wall of the furnaceand be thereby reflected to the next reflector of the series, the lastof which is at the front of the furnace or other point at which theindicator is to be observed.

The invention consists in thel features of novelty that are hereinafterdescribed with reference to the accompanying drawings, which are made apart of this specification, and in which- Figure I is a vertical sectionof a furnace and of an indicator embodying the invention. Fig. 2 is adetail view of one of the reflectorboxes.

A represents the lire-box of a furnace, through the rear wall of whichis a variable opening or peep-hole a. Extending from this peep-hole is atube B, which opens into a box C, containing a reflector D, so arrangedthat the rays issuing from the fire box `through the peep-hole and tubewill strike it.

Extending from this reflector-box O squarely in the direction ofreiiection of the reflector D is a tube E, which enters a second box F,containing a reflector G, arranged to receive the rays coming from therefiector D. In like manner a tube H extends from the box E to a boxI,containing a reflector J,and a tube K extends from this box I to a boxL, containing a re' iiector M. This latter box is open, so that theattendant may see the reflector M, to which the rays issuing from thepeep-hole are transmitted by the Aseveral reflectors, which Serial No.100,220. (No model.)

are arranged at angles appropriate to the end aimed at. The tubesconnecting the several refiector-boxes maybe of any diameter and length,and the mirrors may be in any relative positions or at any angles whichmay be necessary in order to enable the last reflector to be placed atthe place at which the condition of the fire is to be indicated. As

shown in the drawings, the reflectors are arranged for right-anglereflections, and each of the boxes is made of two sides N, arranged atright angles to each other and havingopenings surrounded by hollow spudsO,with which the connectingtubes telescope, two triangular sides P,filling the angles formed by the sides N, and a diagonal side Q, whichsupports `the reflector, one of the sides N being terminated somedistance from the side Q to leave a slot R, through which the reliectormay be inserted and removed.

I have described my invention inits use as an indicator for furnaces;but it is manifest that it may be used for many other purposesrequiringthe reflection of rays of light from pointto point. In jails orother buildings it may be used -for Viewing the interior of a distantcell or roomior .other part of the building. It may be used to enablewatch'men to View vaults, safes, dac., or the rooms containing them, inwhich case the last reflector of the series may be located on theoutside of the building or in any other convenient place. It may be usedfor transmitting light into cellars orsubterranean rooms or into theremote parts of rooms of considerable depth. In fact, it may be usedWherever rays of light are to be transmitted indirectly from one pointto another.

What I claim as new, and desire to secure by Letters Patent, is-

In a device of the class described, the combination of a series ofreflectors arranged to reflect rays from one to another in succession,one of said reflectors being arranged directly gular reflector-box foreach of said reflectors, the said boxes having two sides, N, arranged atright angles to each other and provided with openings through them,hollow spuds, O, surrounding said openings, two triangu- `opposite thepeep-hole of the furnace, a trian- IOO lar sides P, filling the angles'formed by the ing from one box to another, substantially as sides N, a.diagonal side, Q, which supports described. the refieotor, one of thesides N being ter- 1 minated some distance from the side Q so as ALBERTE' POWELL' 5 to leave a slot R, through which the reector Witnesses:

may be inserted and removed, and tubes tele- S. W. ARBUCKLE, scopingwith the hollow spuds O and extend- E. R. CALL.

